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Power Supply Calculator

Posted: Tue Sep 13, 2005 8:35 pm
by daveagn
Saw this over at Shacknews and figured it would be worth a repost over here. It's a power supply calculator. http://www.jscustompcs.com/power_supply/ . I can't vouch for it's accuracy, but it seems interesting.

**Thread made sticky: usacomp2k3

Posted: Tue Sep 13, 2005 8:46 pm
by spiritwalker2222
Check out this calculator too, you can include your OC info.

http://www.extreme.outervision.com/index.jsp

Posted: Tue Sep 13, 2005 9:24 pm
by SpotTheCat
346 watts. I didn't overdo it with my enermax 420 :)

Posted: Tue Sep 13, 2005 10:16 pm
by Usacomp2k3
336 for me. Awefully close to the 350W that I have.

I'm going to sticky this, so anybody feel free to add any other websites and opinions.

EDIT: forgot to add the video card. 393 for me now :wink: Guess my computer is going to fry soon :D

Posted: Tue Sep 13, 2005 10:40 pm
by dragmor
You can ignore these power supply calculates wattage needs to be balanced with what each rail can provide. Both of these calculators spec my shuttle higher than the power supply (240w) and people are running much bigger rigs than min of 240w.

Have a read of the following.
http://www.silentpcreview.com/article265-page1.html
http://www.silentpcreview.com/article28-page1.html

Most PC's require less than 250w.

Posted: Tue Sep 13, 2005 10:44 pm
by Usacomp2k3
I think it's more of a general guide, not an exact science.

Posted: Tue Sep 13, 2005 11:37 pm
by SpotTheCat
it doesn't even have most of the newer stuff though. It doesn't stress quality over quantity either :(

Posted: Tue Sep 13, 2005 11:46 pm
by Felix
260w outa 300w on my aria..not too bad i guess...

Posted: Wed Sep 14, 2005 1:25 am
by Usacomp2k3
SpotTheCat wrote:
it doesn't even have most of the newer stuff though. It doesn't stress quality over quantity either :(

One would imagine that if a PSU says that it can handle 15A on the 12V rail, that that means that it can support at least 180 watts of usage at once on that rail. The discrepancy with the cheap brands lies in the fact that this is more of a maximium, not a minimum.
</large generalization>

Posted: Wed Sep 14, 2005 2:42 am
by madgun
mine's coming out to be 410Watts[under 100% utilization]... i think thats a bit less as i have 7 fans running at full blast along with all the hardware...

Posted: Wed Sep 14, 2005 3:22 am
by redmouse
For me it's 329w if assuming 100% utilization. I guess I'm safe with my TRU380

Posted: Wed Sep 14, 2005 4:34 am
by cheesyking
just totaled up my farm...

537W :o

that's running off of 3 200W PSUs so that just leaves me with the electric bill to worry about :lol: :cry:

the duron 850 I've got in there just can't be worth running 19MHz per Watt as opposed to 28 for the duron1600, might have to get some more of them

Posted: Wed Sep 14, 2005 7:35 am
by liquidsquid
Wow, I calculated 278W under full load, but my actual power meter under load reads 160W.
When the CPU manufacturer lists power requirments, it must be absolute peak power which I think you would be hard-pressed to replicate. Under load my AMD64 X44200+ is only requiring 38W with two instances of folding running, while the calculator lists 110W. While folding probably doesn't stress all parts of the CPU, folding must be a fairly good stress test.

It still amazes me how much power video cards are using these days.

-LS

Posted: Wed Sep 14, 2005 8:25 am
by cheesyking
liquidsquid wrote:
Wow, I calculated 278W under full load, but my actual power meter under load reads 160W.
When the CPU manufacturer lists power requirments, it must be absolute peak power which I think you would be hard-pressed to replicate. Under load my AMD64 X44200+ is only requiring 38W with two instances of folding running, while the calculator lists 110W. While folding probably doesn't stress all parts of the CPU, folding must be a fairly good stress test.

It still amazes me how much power video cards are using these days.

-LS


Yeah, AMD quote power output as absolute peak, while Intel list it as some kind of "real life" figure.

I've always been supprised at how much difference the various FAH cores have on heat output, almost 10C on my 3000XP.

Posted: Wed Sep 14, 2005 9:46 am
by Scorpiuscat
322 watts...interesting, I thought I was using more than that.

Oh well, my Antec 480 has got me covered at any rate.

Posted: Wed Sep 14, 2005 9:51 am
by LicketySplit
While that may tell you what you need in terms of power, its always good to have a supply that give you more than you require. I use a 20% cushion to be safe.

Posted: Wed Sep 14, 2005 12:55 pm
by SpotTheCat
My dad's comes in at 509 watts.... I guess he'd be safe with a PC power and cooling 510 :)

If only he had SLI 6800U then he'd be hard pressed for a capable unit.

Posted: Wed Sep 14, 2005 8:20 pm
by Convert
380 here.

Posted: Tue Sep 20, 2005 2:56 pm
by Dyn0mutt
411w PSU needed for me, so my Hiper 580w is plenty

Posted: Tue Sep 20, 2005 3:10 pm
by tsoulier
336 w for me so my 520 w is plenty

Posted: Tue Sep 20, 2005 3:16 pm
by FroBozz_Inc
409Watts using the overclocking calculator.

Hugs my Thermaltake 420Watt, and whispers sweet nothings to it!

So far so good, it's been about 1.5 years so far.

Note to self: Buy 500Watt PSU next time around.

Posted: Wed Nov 02, 2005 4:36 am
by Forge
First calc says 684 watts. Second says 544, but it's also assuming one CPU.

Guess my 500W Antec really is overloaded. :P Looks like the PCP&C 850W I'm ordering will do the trick, though.

Posted: Sat May 12, 2007 7:13 am
by deinabog
The Shack site recommended a 405-watt unit; I'm currently running a 550-watt PSU. So I'm good.

Posted: Wed Jul 18, 2007 2:29 pm
by BIF
The first link didn't contain an option for a dual Opteron. This is the problem I have with most calculators; not configurable enough.

Re: Power Supply Calculator

Posted: Fri Feb 22, 2008 3:09 am
by Dezined Agreshon
I can't comment on it's accuracy, but here is a maintained calculator that a) is free and b) gives a whole wealth of info, including rail specific amps

http://web.aanet.com.au/SnooP/psucalc.php

Re: Power Supply Calculator

Posted: Sat Apr 05, 2008 7:07 pm
by newmillenium
Almost 400 watts.. I'm running stable on a 250w though :)

Re: Power Supply Calculator

Posted: Sun Apr 06, 2008 7:09 am
by morphine
Never forget that the PSU calculators always use peak power draw values for all your components, which is basically an impossible-to-obtain situation. In any case, the calculator in the 2nd post is what I've been using, it has every component under the sun and options for everything.

Re: Power Supply Calculator

Posted: Mon Apr 07, 2008 10:15 am
by deinabog
It would be nice if the site were updated to calculate the latest hardware (CPUs, GPUs, etc). According to UPS software installed on both my boxes the old unit (Old Reliable) uses more wattage (216-232) than the new one (Big Ed Mustafa at 155-164). And that's with a quad-core CPU installed.

I thiNK the difference is the neww box uses all SATA drives which require less power. The old PC uses SATA hard drives too but also one IDE drive and three IDE DVD burners also.

Re: Power Supply Calculator

Posted: Tue Jun 10, 2008 1:15 pm
by rhema83
The second link (eXtreme calculator) is very updated. My system is 263W at 100% TDP for CPU and 100% system load. I guess I don't need a 500W Antec after all.

Re: Power Supply Calculator

Posted: Thu Jun 19, 2008 8:53 am
by CobrA4cS
I have a 400W it's good ?